4X + 15 less than or equal to x square + 2x

4X + 15 less than or equal to x square + 2x

4x+15=0
The factorization is: (X-5) (x + 3) > = 0
The system of inequalities: X-5 ≥ 0, x + 3 ≥ 0 (1)
x-5≤0 x+3≤0(2)
From (1): X ≥ 5 and X ≥ - 3 take the intersection x ≥ 5
From (2), we get that x ≤ 5 and X ≤ - 3 take the intersection x ≤ - 3
So x ≥ 5 or X ≤ - 3